Carlos De Siguenza Y Gongora, a Mexican scholar, born in Mexico in 1645, died there, Aug. 22, 1700. He was chaplain to the archbishop of Mexico, and taught astronomy and mathematics in the university of that city for 20 years. King Charles II. of Spain created him royal cosmographer and mathematician. He had several discussions on the nature of comets with Father Kuhn, the colonizer of California, and wrote histories of Texas and the Chichimecas, an account of the recovery of New Mexico after the revolt of 1680, and a history of the university of Mexico. With Juan de Alva Ixtlixochitl he prepared several treatises on Mexican antiquities and early American history, which perished with his library in the great fire of June, 1692. He was director of the military school of Mexico for several years, and in 1693 was appointed to accompany the expedition of Andres de Pes against the French settlements in the gulf of Mexico. He planned the fortifications of Pen-sacola, and soon afterward published maps of the bays of Pensacola (Santa Maria de Galve) and Mobile, and of the Rio de la Palizada or Mississippi. His name was subsequently given to one extremity of Santa Rosa island and to the fort erected there.

He entered the society of Jesus in 1693. His principal works are: Ver Indicum, Poema sacro-epicum (8vo, Mexico, 1668; 4to, 1680); Expositio Philosophica adversus Cometas (1681); Triumphus Parthe-nicus (4to, 1684); Libra Astronomica et Philosophica (1690); Infortunia Alfonsi Ramirez circum per Orbem euntis (1693); Mercurins volans et Novum Mexicum restauratum proe; se ferens (1693); Descriptio Sinus Sanctoe Mariae de Galoe (1693); and a topography of Mexico and its neighborhood, enlarged and republished by Alzate in 1786.